#include <iostream>
#include <vector>

using namespace std;

constexpr int MAX = 1001;

int main() {
    int n, m, l;
    cin >> n >> m >> l;
    vector<int> a(n);
    for (int i = 0; i < n; i++) cin >> a[i];
    vector<vector<bool>> dp(n + 1, vector<bool>(MAX, false));
    dp[0][l] = true;

    for (int i = 0; i < n; i++) {
        for (int j = 0; j <= MAX; j++) {
            if (dp[i][j]) {
                dp[i + 1][j] = true;
                int nxt = (j + a[i]) / 2;
                dp[i + 1][nxt] = true;
            }
        }
    }

    cout << (dp[n][m] ? "Yes" : "No") << endl;
}